package unit5.part3;

public class MainClass {
    public static void main(String[] args) {
        System.out.println("图书馆规定最晚归还日期:" + DateUtils.getReturnDate());
        String retDate = DateUtils.getReturnDate(20);
        if (retDate != null)
            System.out.println("书籍实际归还日期:" + retDate);
        else
            System.out.println("借阅时间过长");
    }
}